@VMRKarnatiI am looking for a 75" TV
C6/7/8 all look promising on paper. Unfortunately they don't have demo units(in Mumbai) to separate the wheat from the chaff.
C72K vs C8K seems to be more of a brightness trap. How much to plonk on a TCL product is a meaningful question according to me.
C72K is India specific, now online and offline both, with Onkyo speaker system and two legs.
C7K is also in sale in India but is an online model, C72K is the showroom model. Only difference is C72K comes with Onkyo speakers and stand at each end of TV but C7K comes with B&O speakers and center stand.
C8K is available in India and can be got from the TCL Brand store. Online it was available until the sale in both 75 and 85 inches but during sale only 85 inch model is available. C8K has more dimming zones compared to C72K. Deliveries for C8K have started and I know someone who got it in Bangalore and also the TCL TVs reddit thread has someone complaining that India model does not get the backlit remote but normal remote only. So in case you are interested in C8K approach the TCL Brand store directly.